Orbit 4SB-MKO-WB 4" Square Wel...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,373.17
Orbit 4SB-MKO-WB 4" Square Welded Box with MKO & WB Bracket, Pack of 100

Orbit 4SB-MKO-WB 4" Square Welded Box with MKO & WB Bracket, Pack of 100

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Model: 4SB-MKO-WB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,373.17
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Orbit 4SB-MKO-WB 4" Square Welded Box with MKO & WB Bracket

The Orbit 4SB-MKO-WB is a 4" square (4S) welded outlet box built to a 1-1/2" depth and factory-equipped with an MKO mounting knockout configuration and a WB bracket for fast, secure rough-in installation. This welded 4-square box is a staple for electricians who need a rugged, code-familiar enclosure for switch, receptacle, and junction applications in new construction and remodel work. The integrated WB bracket allows the box to be positioned and fastened to framing members quickly, reducing installation time on the jobsite while keeping the box square and properly set for device or cover plate installation. As a welded (rather than stamped/one-piece) 4S box, it offers the solid, rigid construction electricians expect from a general-purpose square box used throughout residential, commercial, and light industrial wiring.

Key Features

  • Box Size: 4" square (4S) footprint, the industry-standard size for device and junction box applications.
  • Depth: 1-1/2" deep, providing standard interior volume for wiring, devices, and connections.
  • Welded Construction: Welded 4-square body for a rigid, durable enclosure that resists flexing during installation and service.
  • MKO Knockout Configuration: Factory MKO knockout pattern for streamlined conduit and cable entry during rough-in.
  • WB Bracket Included: Integrated WB mounting bracket simplifies attachment to studs or framing for accurate, secure box placement.
  • General-Purpose Design: Suited for switch, receptacle, and junction box use in a wide range of electrical rough-in applications.

Technical Specifications

  • Box Type: 4" Square (4S) Welded Outlet Box
  • Depth: 1-1/2"
  • Bracket: WB (Welded Bracket) mounting bracket
  • Knockout Configuration: MKO

Typical Applications

  • New Construction Electrical Rough-In
  • Residential and Commercial Switch/Receptacle Installations
  • Junction Box Applications
  • Stud-Mounted Outlet Box Installations
  • Panelboard-Adjacent and General Wiring Enclosures

Why Orbit?

Orbit's 4SB-MKO-WB welded 4-square box combines a rigid welded body with a practical MKO knockout layout and an integrated WB bracket, giving electrical contractors a dependable, ready-to-mount enclosure for everyday rough-in work. It's a straightforward, no-nonsense box built for the demands of professional installation.

Manufacturer Resources

Product Specs

list_batch:
ORB-20260924
Product Type:
Outlet Box
Configuration:
4" Square (4S) Welded Box with MKO & WB Bracket
Department:
Electrical
Product Subgroup:
Electrical Boxes
Product Size:
1-1/2"
Pack size (unit):
100
Product Group:
Boxes & Enclosures

Orbit 4SB-MKO-WB – Frequently Asked Questions

1) How deep is the Orbit 4SB-MKO-WB 4 inch square box, and will it take a standard device?
It's a 4 inch square (4S) welded box at 1-1/2 inches deep, which is the standard depth for switch, receptacle, and junction work. The 4S footprint is the common size device rings and square cover plates are built around, so a standard mud ring or flat cover drops right on.
2) Does the Orbit 4SB-MKO-WB come with a mounting bracket, or do I need to buy one?
The bracket is on the box. The 4SB-MKO-WB ships with the WB (welded) bracket already attached, so it nails or screws straight to a stud or framing member without a separate bar hanger or clip. That's what makes it a rough-in box rather than a retrofit box.
3) Is a PVC box like the Cantex EZ Box an equivalent swap for the Orbit 4SB-MKO-WB?
They serve similar rough-in roles but are not the same item. The Orbit 4SB-MKO-WB is a welded 4-inch square metal box, 1-1/2 inches deep, with an MKO knockout configuration and an integrated WB bracket for stud mounting, and it accepts standard 4S device and cover plates. The Cantex EZ Box is a PVC multi-gang residential outlet box, so it is a nonmetallic multi-gang device box rather than a 4-square. If your drawing calls for a 4S box with a square cover, the Orbit is the match; for nonmetallic cable work with multi-gang device openings, the EZ Box is the different approach.
4) What does MKO mean on an Orbit 4 square box?
MKO is the knockout configuration the box is punched with at the factory, giving you the conduit and cable entry pattern for rough-in. Orbit builds the 4SB-MKO-WB with the MKO pattern plus the WB bracket as one assembly, so you're ordering a specific entry layout, not a blank box you punch yourself.
5) How many Orbit 4SB-MKO-WB boxes come in a pack?
They ship 100 to the pack, which is how 4-square rough-in boxes are normally bought for a tract or a commercial floor. Part number is 4SB-MKO-WB if you're matching what's already set on the job.
6) Should I use a steel 4 square box or a PVC box for residential rough-in?
If you're running EMT or MC and want a bracket that sets the box square to the stud, the welded steel 4SB-MKO-WB with its WB bracket is the right call, and the 4S footprint covers switch, receptacle, and junction duty. If you're running NM cable in a house and want a multi-gang nonmetallic box instead, the Cantex EZ Box series is the PVC residential alternative.
7) Will a bracketed 4 square box work in an existing finished wall?
Not well. The WB bracket is made to fasten to exposed framing during rough-in, before drywall goes up, so it isn't a cut-in box. For remodel work in a closed wall you want an old-work box with retention ears or clips instead.
8) I need boxes for a conduit system with threaded hubs - does the Orbit 4SB-MKO-WB work?
The Orbit 4SB-MKO-WB uses an MKO knockout pattern, so conduit and cable entries are made through knockouts with connectors rather than factory threaded hubs. If you want hubs pre-formed into the body, the Thomas & Betts 2IH3-1 Red-Dot is a 2-gang conduit outlet box with three 1/2-inch hubs. The Orbit remains the choice where the box is fastened to framing by its WB bracket and fitted with standard 4-square covers.
9) Is a welded 4 square box different from a one-piece stamped box?
Yes. The 4SB-MKO-WB body is welded rather than stamped as a single piece, which gives a rigid enclosure that resists flexing while you're pulling wire or torquing device screws. For general-purpose switch, receptacle, and junction use in residential, commercial, and light industrial work, that rigidity is the practical difference.
10) Which of these boxes come in contractor 100-packs?
The Orbit 4SB-MKO-WB 4-inch square welded box is packed 100 to a unit, and the Thomas & Betts 2IH3-1 Red-Dot 2-gang conduit outlet box is also supplied in a pack of 100. That makes both suited to standardizing a full rough-in or exposed-conduit scope on one box type.
How fast can I get the Orbit 4SB-MKO-WB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Orbit 4SB-MKO-WB come with a warranty?
Absolutely. The Orbit 4SB-MKO-WB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Orbit 4SB-MKO-WB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Orbit 4SB-MKO-WB from ZenSupply?
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